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' (No Model.)

\ R. S. WILLIAMS.

DENTAL FOIL CONDENSER.

No. 298,717. Patented May 13, 1884.

WITNESSES: YINVENTQR Md gal/flaw AM- Id! B l ATTORNEY *arnra'r rrrcn.

\ RICHARD S. \VILLIAMS, OF NFNV YORK, N. Y.

DENTAL FOlL CONDENSER.

SPECIFICATION forming part of Letters Patent No. 298,717, dated May 13, 1884.

Application filed September 17, 1883. No model.)

To aZZ whom it may concern.-

Be it known that I, RICHARD S. WILLIAMs, of the city, county, and State of New York, have invented a new and useful Improvement in Apparatus for Making Cylinders, Pellets, and other Forms of Dental Foil; and I do hereby declare the following to be afull, clear, and exact description of the same, reference being had to the accompanying sheet of drawings, forming part of .this specification.

This invention is in the nature of an improvement in the apparatus for making cylinders, pellets, and other forms of dental foil; and the invention consists in the apparatus hereinafter described for making said forms.

In the accompanying sheet of drawings, Figure 1 is a plan View of former; Fig. 2, a longitudinal section in the line it m, Fig. 1; Fig. 3, a cross-section in the line y y, Fig. 1; Fig. 4, a perspective view of rolled cylinder; Fig. 5, a cross-section of folded foil.

Similar letters of reference indicate like parts in the several figures.

The foil employed by dentists, for conven ience in handling and applying it,is frequently made up into small cylinders of cubical or other shaped blocks or forms. In making them the foil is frequently rolled up in long cylinders, or folded up intoprism shape. The operation of making these several forms has heretofore been accomplished by hand, and a mandrel or former requiring much time and patience; and besides the pellets, 850., when in this way made,were not of uniform size and shape, the foil was necessarily handled to some extent, which left a film of'oil on the foil that interfered with its adhesive quality. To avoid this last-named difiiculty and to expedite the construction of the cylinders, pellets, &c.,referred to, I proceed in the following manner: The sheet of foil, of any desired quality, is first, by means of the device patented to me on the 15th day of July, 1873, folded into parallel lamina-3. (See Fig. 5.) The foil so folded is next placed upon abed, A, whose upper surface is covered with chamois leather a. On

each edge of this bedAare secured two guides, B, which project-slightly above the surface of the bed A, and they are made so as to be adjustab1e-that is, so that their edges may be made to project above the bed more or less, to any reasonable extent. A platen, O, with its under surface covered also with chamois leather, and its upper surface having secured to it a handle, I), is next provided. The folded b gold just described is placed on the bed A, the platen O on the edges of the guide B, and then,with the hand on the handle 6, the platen is caused to slide along the guides, and in so doing it rolls up the folded foil between it and the bed A in a cylindrical form or stem of foil, the diameter of which will depend upon the space between the under surface of the platen G and the upper surface of the bed A. This space is regulated by adjusting the height of the guides b. The foil in this way rolled up, it will be seen, does not come in contact with the fingers of the operator, and is therefore free from defilement from this cause, and its adhesive quality therefore notimpaired.

If desired,the platen C may be made to form a twisted or spiral roll of the foil by simply slanting it somewhat and moving it at the same time in a slightly-curved direction. I do not wish to limit myself to plane surfaces, for it is evidentthat the same principles can be applied with curved surfaces. The foil in this way rolled up is now out into the required sections or pellets of varying form, and is ready for annealing and use.

Having now described my invention, what I claim as new, and desire to secure by Letters Patent, is

The device hereinbefore described for rolling up dental foil, consisting of a bed, A, with adjustable guides. B and a platen, C, as and for the purpose described.

RICHARD S. WILLIAMS. Witnesses:

JULIAN MOV. ANDERSON, G. M. 'PLYMPTON. 

